3.3 LBBAP with SDL procedure-related outcomes
LBBAP was successful in 65 of 69 (94.2%) patients, while 200 underwent conventional RVP. Four patients in whom LBBAP failed, conversion to conventional RVP was done and these patients were excluded from this study population. The procedural outcomes according to the increase in experience were as follows: Up to the 25th case, until the plateau phase of the procedure, the time was defined as the early period, and after the plateau phase, it was further divided into a middle period and a late period (divided by 20 cases each). The success rates of the procedures in each period were 89.3%, 95.2%, and 100%, respectively (Table 2, Supplementary Figure S4). The number of screw attempts did not significantly decrease as the number of cases increased, but the number of sheath change (0.36 ± 0.70, 0.20 ± 0.52, P <0.05) significantly decreased as the number of cases increased.
There were three cases of major complications during the early and middle period, of which there was one hematoma requiring prolonged hospitalization, and two ventricular lead dislodgements occurring 1 day and 3 months after the procedure, respectively. Of the two dislodgement cases, one patient required ventricular lead revision and LBBAP was achieved again, and one case did not require revision because of its stable parameters with a ventricular lead in the RV inferior wall.